Issued Patents All Time
Showing 1–23 of 23 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6026730 | Flow control apparatus in a hydraulic circuit | Nobumi Yoshida, Nobuhisa Honda | 2000-02-22 |
| 5813310 | Working machine fall preventive valve apparatus | Shuji Hori | 1998-09-29 |
| 5692427 | Flow reinforcement directional control valve for a hydraulic circuit | Nobumi Yoshida, Nobuhisa Honda | 1997-12-02 |
| 5673557 | Displacement control system for variable displacement type hydraulic pump | Nobumi Yoshida, Nobuhisa Honda | 1997-10-07 |
| 5622206 | Multiple valve unit for pressurized fluid supply system | Masamitsu Takeuchi, Kazunori Ikei, Mitsumasa Akashi, Teruo Akiyama, Jun Maruyama +1 more | 1997-04-22 |
| 5558127 | Hydraulic pilot valve | Jun Maruyama, Seita Hayashi, Suji Hori | 1996-09-24 |
| 5533334 | Pressurized fluid supply system | Masamitsu Takeuchi, Kazunori Ikei, Mitsumasa Akashi, Teruo Akiyama, Jun Maruyama +1 more | 1996-07-09 |
| 5481872 | Hydraulic circuit for operating plural actuators and its pressure compensating valve and maximum load pressure detector | Teruo Akiyama, Kouji Yamashita, Naoki Ishizaki | 1996-01-09 |
| 5409038 | Hydraulic circuit including pressure compensating valve | Nobumi Yoshida, Teruo Akiyama | 1995-04-25 |
| 5291821 | Hydraulic circuit for swivel working machine | Kohji Yamashita, Teruo Akiyama, Naoki Isizaki | 1994-03-08 |
| 5259192 | Hydraulic circuit system | Teruo Akiyama | 1993-11-09 |
| 5255705 | Hydraulic pressure control system | Kazuo Uehara, Sadao Nunotani, Naoki Ishizaki, Masayuki Tanaami | 1993-10-26 |
| 5253672 | Hydraulic pressure control system | Kazuo Uehara, Sadao Nunotani, Naoki Ishizaki, Masayuki Tanaami | 1993-10-19 |
| 5224589 | Operating lever device | Mitsumasa Akashi | 1993-07-06 |
| 5184646 | Pilot valve | Shuji Hori, Jun Maruyama | 1993-02-09 |
| 5136930 | Apparatus for supplying pressure oil to hydraulic cylinders employed in working machines | Hiroshi Endo, Sadao Nunotani, Naoki Ishizaki, Toshiro Takano | 1992-08-11 |
| 5076144 | Poppet valve device | Sadao Nunotani, Naoki Ishizaki, Toshiro Takano | 1991-12-31 |
| 5056415 | Pilot operated control valve system performing a support function | Naoki Ishizaki, Yosuke Oda | 1991-10-15 |
| 5046400 | Control valve system | Naoki Ishizaki, Yosuke Oda | 1991-09-10 |
| 5040565 | Pilot operated control valve system | Naoki Ishizaki, Yosuke Oda | 1991-08-20 |
| 4984603 | Flow control valve assembly | Naoki Ishizaki, Toshiro Takano, Sadao Nunotani | 1991-01-15 |
| 4633666 | Integrated hydraulic system | — | 1987-01-06 |
| 4517800 | Hydraulic control system for off-highway self-propelled work machines | Kazuo Uehara | 1985-05-21 |